A woman carrying a bundle on her head wait in line to cross the border into Colombia through the Simon Bolivar bridge in San Antonio del Tachira, Venezuela, Sunday, July 17, 2016. Tens of thousands of Venezuelans crossed the border into Colombia on Sunday to hunt for food and medicine that are in short supply at home. It's the second weekend in a row that Venezuela’s government has opened the long-closed border connecting Venezuela to Colombia. (Photo by Ariana Cubillos/AP Photo)

Venezuelans cross the Simon Bolivar bridge linking San Antonio del Tachira, in Venezuela with Cucuta in Colombia, to buy basic supplies on July 17, 2016. Thousands of Venezuelans again poured into the Colombian city of Cucuta on Sunday, profiting from the brief reopening of a long-closed border to buy food and medicine. (Photo by George Castellano/AFP Photo)

A woman and a child use plastic bags to take cover from the rain as they cross the Colombian-Venezuelan border over the Simon Bolivar international bridge after shopping, in San Antonio del Tachira, Venezuela, July 16, 2016. (Photo by Carlos Eduardo Ramirez/Reuters)

People are seen carrying a package as they cross the Colombian-Venezuelan border over the Simon Bolivar international bridge after shopping, in San Antonio del Tachira, Venezuela, July 16, 2016. (Photo by Carlos Eduardo Ramirez/Reuters)

Colombia civil defense carry a coffin as they to cross the Colombian-Venezuelan border in Cucuta, Colombia, July 16, 2016. (Photo by Carlos Eduardo Ramirez/Reuters)

A young woman carries toilet paper as she crosses the Colombian-Venezuelan border over the Simon Bolivar international bridge after shopping while a Colombian police officer looks on in Cucuta, Colombia, July 16, 2016. (Photo by Carlos Eduardo Ramirez/Reuters)

Women buy food staples at a local shop at the Colombian-Venezuelan border in Cucuta, Colombia, July 16, 2016. (Photo by Carlos Eduardo Ramirez/Reuters)

A woman push a pram with a baby and bags as she crosses the Colombian-Venezuelan border over the Simon Bolivar international bridge after shopping, in San Antonio del Tachira, Venezuela, July 16, 2016. (Photo by Carlos Eduardo Ramirez/Reuters)

A Colombian police officer gives direction to people lining up to cross over the Simon Bolivar international bridge to Colombia to take advantage of the temporary border opening in San Antonio del Tachira, Venezuela, July 17, 2016. (Photo by Carlos Eduardo Ramirez/Reuters)

People line up to cross over the Simon Bolivar international bridge to Colombia to take advantage of the temporary border opening in San Antonio del Tachira, Venezuela, July 17, 2016. (Photo by Carlos Eduardo Ramirez/Reuters)

A Colombian police officer looks on as people line up to cross over the Simon Bolivar international bridge to Colombia to take advantage of the temporary border opening in San Antonio del Tachira, Venezuela, July 17, 2016. (Photo by Carlos Eduardo Ramirez/Reuters)

A woman holds up a Venezuelan flag as people line up to cross over the Simon Bolivar international bridge to Colombia to take advantage of the temporary border opening in San Antonio del Tachira, Venezuela, July 17, 2016. (Photo by Carlos Eduardo Ramirez/Reuters)

People walk to cross over the Simon Bolivar international bridge to Colombia to take advantage of the temporary border opening in San Antonio del Tachira, Venezuela, July 17, 2016. (Photo by Carlos Eduardo Ramirez/Reuters)

People are seen carrying bags and packages as they cross the Colombian-Venezuelan border over the Simon Bolivar international bridge after shopping in Cucuta, Colombia, July 17, 2016. (Photo by Carlos Eduardo Ramirez/Reuters)

Colombian police officers help people to carry bags as they cross the Colombian-Venezuelan border over the Simon Bolivar international bridge after shopping in Cucuta, Colombia, July 17, 2016. (Photo by Carlos Eduardo Ramirez/Reuters)

Venezuelans cross the Simon Bolivar bridge linking San Antonio del Tachira, Venezuela, with Cucuta, Colombia, to buy supplies, Sunday, July 17, 2016. Tens of thousands of Venezuelans crossed the border into Colombia on Sunday to hunt for food and medicine that are in short supply at home. It's the second weekend in a row that Venezuela’s government has opened the long-closed border connecting Venezuela to Colombia, and by 6 a.m., a line of would-be shoppers snaked through the entire town of San Antonio del Tachira. (Photo by Ariana Cubillos/AP Photo)

A man walks by Colobian policemen as he crosses into Colombia through the Simon Bolivar bridge linking San Antonio del Tachira, Venezuela, with Cucuta, Colombia, Sunday, July 17, 2016. (Photo by Ariana Cubillos/AP Photo)

Venezuelans gather to cross the border between Venezuela and Colombia at the Simon Bolivar bridge in San Antonio del Tachira, Venezuela, to buy supplies Sunday July 17, 2016. (Photo by Ariana Cubillos/AP Photo)

Venezuelans cross the Simon Bolivar bridge linking San Antonio del Tachira, in Venezuela with Cucuta, Colombia, to buy basic supplies on July 16, 2016. (Photo by George Castellano/AFP Photo)